Firstly, a criticism of the flaws of extreme Liberalism is not an endorsement of extreme Conservatism.
Secondly, it is clear that this is the sort of thing that happens when you have a racist madman in charge and we should be focusing on what will defeat him and the Republicans which, in fairness, I think is what Biden will do, focus on what will be most likely to defeat him, that is, and, hopefully, actually beat him. Focusing on political correctness in the way the Democratic party is going will not.
Maher is right that a lot of people do not perceive the Democratic party as caring about their interests and I will say that two of the things Maher mentions apply to me. Yes, extremist Republicans are murderously insane. Extremist Democrats are mostly just sensitive and trivial. So it might be a great idea to defeat those Republicans.